Transmission mechanism for hoisting apparatus



Jan. 5, 1932.

H. W. BAUM TRANSMISSION MECHANISM FOR 'HOISTING APPARATUS Original FiledFeb. 13, 1928- 2 Sheets-Sheet 1 Inventor Fae; 271/ Attorney Jan. .5,19.32.

H. W. BAUM TRANSMISSION MECHANISM FOR HOISTING APPARATUS Jriginal FiledFeb. 13, 1928 2 Sheets-Sheet 2 I v Inventor f Jiffiffifaam AttorneyPatented Jan. 5, 1932 HOWARD W. BAUM, F KEABNY, NEW JERSEY TRANSMISSIONMECHANISM FOR HOISTING APPARATUS 7 Original application filedFebruary13, 1928, Serial N 0. 253,985. Divided and this application filedJanuary 22, 1929. Serial No. 334,223.

The present invention appertains to improvements in transmissionmechanism, and the subject matter of this application has been dividedfrom my co-pending applica-- tion, filed February 13, 1928, Serial N o.253,-

985, for a catch basin cleaner and hoisting apparatus.

The invention relates more specifically to a transmission mechanismadapted for use on hoisting apparatus, and has as its principal objectthe provision of a mechanism which will not only be practicallyfoolproof in operation, but will be simple and eflicient in use.

The present apparatus also possesses the qualities of being compact anddurable.

After considering the following description and claim, it will be seenthat other objects and advantages exist.

In the drawings through the lower portion of the pedestal and castingand base structure of the hoisting apparatus.

Fig. 2 is a fragmentary horizontal section taken substantially on theline 22 of Fig. 1.

Fig. 3 is a detail vertical section taken substantially through thetransmission mechanism.

Fig. 4 is a vertical section taken substantially on the line H of Fig.3.

Fig. 5 is a vertical section taken substantially on the line 55 of Fig.3.

Referring to the drawings wherein like numerals designate like parts,the numeral 5 includes a base structure with a pedestal casting 9 risingtherefrom. This represents a part of a hoist structure. The pedestalcasting 6 is hollow and has extending therethrough a tubular mast 7which is j ournaled in a bearing 8 provided in the base structure 5. Aworm gear 6 is fixed to the lower end of the mast 7 and is housed in thebase by means of a plate 10 which is provided with an opening 11,aportion of which registers with the interior of the mass 7.

An annular packing 10 is interposed between the wheel 9 and the coverplate 10 for preventing the escape of oil from Within the base structure5 through the opening 11. Brackets 12 depend from the edges of theFigure 1 is a fragmentary vertical section openings 11 of the coverplate 10 and support ashaft 13 on which a pair of sheaves 14: arerotatably mounted. A shaft 15 is journaled in the base structuretangentially to the worm gear 9. A worm 16 is suitably fixed to theshaft 15 and meshes with the vworm gear 9. The gears 17 and 18 are fixedfor rotation with the shaft 15.

A drive gear 19 is journaled through a super-structure 20 rising fromthe base structure 5 and has fixed thereto gears 21 and 22 on the innerfaces of which are series of clutch teeth 23 and 24 respectively. Thegears 17 and 21 are in mesh and a pinion 16 on counter shaft 51 mesheswith gears 22 and 18.

The series are arranged in an annular manner about the drive shaft 19.Clutch members 25 and 26 for meshing respectively with teeth 23 and 24are formed in a unit splined on the shaft 19, the gears 21 and 22 beingrotatable thereon. A fork 27 is used for shifting the unit either to aneutral position shown in Fig. 5 or so that the clutch segment 25 mesheswith the clutch segment 23, or the clutch segment 26 meshes with theclutch segment 24.

This fork is operated by means of a bar 28 slidable through the superstructure 20 and having notches 29 with which are engageable a springpressed ball 30, for holding the fork in one of the three mentionedpositions. The bar 28 is adjusted by suitable means connected to theapertured end of the bar, which may be manually or power operated.

Thus it will be seen that the mast may be turned in either directionthrough the inter- I mediacy of the mechanism, with which it may beoperated from any suitable prime mover, which is not of the essence ofthis invention, and therefore not shown.

Having thus described my invention, what I I claim as new is A structurecomprising, in combination, a casing having an opening in its bottom,said casing adapted to contain a lubricant, a tubular, vertical masthaving its lower end portion extending rotatably into the casing throughthe top thereof, a pulley wheel rotatably mounted on the casing beneaththe bottom thereof and adjacent the opening, a cable trained over thepulley wheel and operable through the'mast,

a gear fixed on the mast in the casing having a concentric channel inits lower side, a resilient packing disposed in the channel and enga gedwith the casing bottom for preventing passage of the lubricant to theopening,

and a gear engaged with the first named gear for driving same.

In testimony whereof I aflix my signature.

HOWARD w. BAUM.

